Cheapest return LIS–OSL flights, September

AirHint found the following cheapest return flights from Lisbon (LIS) to Oslo (OSL) in September 2026 (see full year).

Return flights

11 Sep - 20 Sep Ryanair
17 Sep - 20 Sep Ryanair
18 Sep - 28 Sep Air Serbia
23 Sep - 02 Oct easyJet
01 Sep - 06 Sep Ryanair
02 Sep - 14 Sep Norwegian
09 Sep - 14 Sep Norwegian
17 Sep - 20 Sep TAP direct
01 Sep - 06 Sep TAP direct
10 Sep - 14 Sep TAP direct
18 Sep - 28 Sep TAP direct
23 Sep - 02 Oct TAP direct

Also check the deals for one-way flights from Lisbon to Oslo in September.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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